[PATCH] D34808: [PowerPC] Fix for PR33636

[Nemanja Ivanovic via Phabricator via llvm-commits]

nemanjai created this revision.

When folding to a constant, it is possible to get an `undef`. Casting such a node to a `ConstSDNode` does not work. This patch just avoids such a cast to prevent a crash.


Repository:
  rL LLVM

https://reviews.llvm.org/D34808

Files:
  lib/Target/PowerPC/PPCISelDAGToDAG.cpp
  test/CodeGen/PowerPC/PR33636.ll

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